As most of our Galaxy Nexus LTE owners know, a test Jelly Bean build was found last night and released this morning for you all to enjoy. If you didn't feel like factory imaging back to stock Android 4.0.4 (IMM76K), so that you could then update to IMM76Q and then eventually onto JRO03O (Android 4.1), you were much more patient than I. That patience has paid off, as a .zip that should take you onto JRO03O from any ROM has been released by @P3Droid.